Finding the Fourth Proportional to 112,386.91, 155,087.72 and 64,641.06

Step by Step Solution

1. Step 1: Write the proportion equation
   112,386.91 : 155,087.72 = 64,641.06 : x
2. Step 2: Convert to fraction form
   112,386.91/155,087.72 = 64,641.06/x
3. Step 3: Cross multiply
   112,386.91x = 155,087.72 × 64,641.06
4. Step 4: Simplify right side
   112,386.91x = 10,025,033,515.14
5. Step 5: Solve for x
   x = 10,025,033,515.14/112,386.91
6. Step 6: Final answer
   x = 89,201.08